ID: 39088
User updated by: msajko at yahoo dot com
Reported By: msajko at yahoo dot com
Status: Bogus
Bug Type: Documentation problem
Operating System: Windows XP
PHP Version: Irrelevant
New Comment:
I can't belive that I will have to use my round functions in every new
aplication I made? :-(
function roundit($val,$precision=0){
$num=$val+(('0.'.str_repeat('0',$precision).'5')*1);
$a=explode(".",$num);
return ($a[0].'.'.substr($a[1],0,$precision))*1;
}
function
numberformat($number,$decimals='2',$dec_point='.',$thousands_sep=','){
$number=roundit($number,$decimals);
return number_format($number,$decimals,$dec_point,$thousands_sep);
}
Previous Comments:
------------------------------------------------------------------------
[2006-10-09 07:58:17] [EMAIL PROTECTED]
Floating point values have a limited precision. Hence a value might
not have the same string representation after any processing. That also
includes writing a floating point value in your script and directly
printing it without any mathematical operations.
If you would like to know more about "floats" and what IEEE
754 is read this:
http://docs.sun.com/source/806-3568/ncg_goldberg.html
Thank you for your interest in PHP.
.
------------------------------------------------------------------------
[2006-10-09 07:54:14] msajko at yahoo dot com
Description:
------------
round(555.305,1) = 555.3
round(555.305,2) = 555.3 !!!? (555.31 is correct)
round(555.305,3) = 555.305
problem appears in Windows binary,
on debian binary it works just fine
Reproduce code:
---------------
echo round(555.305,2) ."\n";
echo (round(555.305,2)*1)."\n";
Expected result:
----------------
555.31
555.31
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=39088&edit=1
